Penske Auto­mo­tive Group sold 39,844 used units the third quar­ter, up from 33,084 vehi­cles in the third quar­ter of 2011. Rev­enue for those used vehi­cle sales rose 8.4% — reach­ing $924.8 mil­lion in third quar­ter 2012 com­pared to $853 mil­lion the year before. Gross prof­it per used vehi­cle retailed didn’t rise dur­ing that time, drop­ping from $1,978 to $1,824.